This is part of an introduction to life classification lesson, which is meant to follow after a brief introduction to the domains of life and kingdoms. This powerpoint presentation presents 9 of the major phyla of the animal kingdom: porifera, cnidaria, platyhelminthes, annelida, mollusca, nematoda, arthropoda, echinodermata, and chordata.
There are good memory aides built into the presentation - including the use of several Spongebob Squarepants characters, which students really seem to find helpful. There are also beautiful creative commons photographs and photo-credited diagrams to help bring to life this level of biology classification.
A good follow-up presentation would be "Classifying Chordates" available here = http://www.teacherspayteachers.com/Product/Classifying-Chordates-1615010